Best option for initial setup of HD's on Xserve (possible RAID)

I'm just about to set up a new network in a new office and have an Xserve with 3 HD's 2x700GB and 1x500GB drive.
Now i have a fair bit of experience with the server itself, however i have zero experience with RAID.
I would like to start automatic backups of the OS (which i do already in a round about way). And have several share points for users network homes and data.
Does anyone have any suggestions of how to setup the HD's themselves, should i RAID? what would be the best option? etc etc etc.
All suggestions are very welcome and appreciated.
Thanks
Steven

No one can answer your question - at least not without more information.
When deciding disk layout you need to factor things like how much usable disk space you need - in this case for users' data. Are the users home directories on the server, or do they just upload files to the server for storage/backup?
What's the intensity of the data? Is reliability or performance more important? Would you pull your hair out if you lost a single file? a day's work? a week's work?
How much downtime could you tolerate if the server crashed?
These questions (and probably more) are important because it helps focus on the needs. For example, if the integrity of the data is more important than uptime you could mirror the two 700 GB drives for the user data and install the OS on the single 1TB drive. Of course this leaves you (slightly) vulnerable to a problem on the OS disk and you could be offline for hours if that disk failed. However, your user data would be mirrored and likely protected from disk failure.
On the other hand, if the uptime of the server is more important, you might opt to install the OS on the 700GB mirror, using the 1TB for user data, relying on backups to restore this disk if it fails.
Or, you might decide to put everything (OS and data) on the 700GB mirror, using the 1TB as the backup destination.
On the other hand you might determine that you need 1TB of user storage space, in which case you either need to use the 1TB for user data, or you need to stripe the two 700GB drives into a 1.4TB array, but then that array has no redundancy and the loss of a single disk will result in the loss of all data.
So, as I said, there is no one single answer to your question. You'll need to balance storage capacity and redundancy to find the best match for you.

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1) I would update first Airport Utility is 5.3.2 and firmware 7.3.2
2) not needed is over kill
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I don't have the same soundcard model, and I can't give you blow-by-blow detail, but try looking in the Bass Management tab of the Speaker Settings control, or you may find something in the THX Setup Console, for bass redirection. You should at least find subwoofer volume and crossover-frequency sliders, and you also might find a center volume control. I'm a proponent of running all soundcard volumes at 00% and controlling listening volume and speaker balance at the amp, since this maximizes the digital SNR, but it can also be less convenient.
Run through the receiver manual's troubleshooting section for "No sound from the center speaker" and "No sound from the subwoofer" just to rule out a setting problem on the receiver side.
Then use "Manually adjusting speaker levels" on pg 45 of the receiver manual, with? MULTI CH IN selected on the remote control, to max the SWFR level (+0dB). Most receivers have separate level settings for their multi-channel input, so it is usually advantageous to provide the +0dB boost this way so it is in effect only when using the soundcard. This boost can be increased further by lowering all of the other settings the same number of dB's: if you subtract dB from all of the others, the effect is to increase the relati've subwoofer volume by dB.
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?[email protected]

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Best option for initial setup of HD's on Xserve (possible RAID)

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